|NASA Explains 'Dust Bowl' Drought - NASA/Goddard Space Flight Center Conceptual Image Lab, Scientific Visualization Studio|
Abnormal sea surface temperatures (SST) in the Pacific and the Atlantic Ocean played a strong role in the 1930s dust bowl drought. Scientists used SST data acquired from old ship records to create starting conditions for the computer models. They let the model run on its own, driven only by the observed monthly global sea surface temperatures. The model was able to reconstruct the Dust Bowl drought quite closely, providing strong evidence that the Great Plains dry spell originated with abnormal ...
Keywords: Byrne, Drought, Earth Science, Gonnelli, Sea Surface Temperature; What -- SST; What -- Earth; Where -- Pacific Ocean; Where -- Atlantic Ocean
|Microbes Hitch Ride on African Dust - NASA/Goddard Space Flight Center Conceptual Image Lab|
Note: Traveling Dust Animation - The dust comes every year during northern Africa's dry season, when storm activity in the Sahara Desert and Sahel generate clouds of dust. The dust originating from fine particles in the arid topsoil is transported into the atmosphere by winds and may be carried in excess of 10,000 feet high into the atmosphere by easterly trade winds. Typically, it takes one to two weeks for the dust clouds to cross the Atlantic Ocean and reach the continental United States....
Keywords: Atmosphere, Byrne, Drought, Dust Cloud, Dust Storm, Earth Science, Gonnelli, Sahara; What -- Earth; Where -- Atlantic Ocean; Where -- United States of America
|Ocean Circulation Conveyor Belt Helps Balance Climate - NASA/Goddard Space Flight Center Conceptual Image Lab|
As part of the ocean conveyor belt, warm water from the tropical Atlantic moves poleward near the surface where it gives up some of its heat to the atmosphere. This process partially moderates the cold temperatures at higher latitudes. As the warm water gives up its heat it becomes more dense and sinks. This circulation loop is closed as the cooled water makes its way slowly back toward the tropics at lower depths in the ocean...
Keywords: Byrne, Climate, Earth Science, Global Warming, Gonnelli, Ice Age, Ocean Currents; What -- Polar; What -- Advanced Communication Technology Satellite (ACTS); What -- Earth; Where -- Atlantic Ocean
|NASA Explains 'Dust Bowl' Drought - NASA/Goddard Space Flight Center Conceptual Image Lab|
This illustration shows how cooler than normal tropical Pacific Ocean temperatures (blues) and warmer than normal tropical Atlantic Ocean temperatures (red and orange) contributed to a weakened low level jet stream and changed its course. The jet stream normally flows westward over the Gulf of Mexico and then turns northward pulling up moisture and dumping rain onto the Great Plains. During the 1930s, this low level jet stream weakened, carrying less moisture, and shifted further south...
Keywords: Byrne, Drought, Earth Science, Gonnelli, Precipitation, Sea Surface Temperature; What -- Earth; Where -- Pacific Ocean; Where -- Atlantic Ocean; Where -- Gulf of Mexico